JPH09505978A - Improvement of electric controller for motor driven refrigeration compressor - Google Patents
Improvement of electric controller for motor driven refrigeration compressorInfo
- Publication number
- JPH09505978A JPH09505978A JP7515358A JP51535895A JPH09505978A JP H09505978 A JPH09505978 A JP H09505978A JP 7515358 A JP7515358 A JP 7515358A JP 51535895 A JP51535895 A JP 51535895A JP H09505978 A JPH09505978 A JP H09505978A
- Authority
- JP
- Japan
- Prior art keywords
- rpm
- motor
- vmax
- control device
- different
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000005057 refrigeration Methods 0.000 title abstract description 23
- 238000000034 method Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 235000013305 food Nutrition 0.000 description 6
- 239000010687 lubricating oil Substances 0.000 description 6
- 238000007710 freezing Methods 0.000 description 4
- 230000008014 freezing Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000012080 ambient air Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000013611 frozen food Nutrition 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/025—Compressor control by controlling speed
- F25B2600/0253—Compressor control by controlling speed with variable speed
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Compressor (AREA)
- Control Of Electric Motors In General (AREA)
- Vending Machines For Individual Products (AREA)
Abstract
(57)【要約】 冷蔵庫または冷凍装置、好ましくは家庭型のもの、は、少なくともブラシなし式の電気駆動モータ、および多数の異なる予め選択可能なRPMのときに該モータに適合される電気周波数制御装置を備えた密閉型レシプロ圧縮器を具備し、前記圧縮器は、前記制御装置が前記モータの動作を停止するような前記モータにおける最小の予め選択可能なRPM(Vmin)によって構成される保護特徴を有する。さらに、前記制御装置は、冷蔵装置の動作を指示する外部コマンドまたは信号の特別な組合せを前記制御装置が供給されるとき、いくつかの予め選択可能なRPMとは異なるモータのRPM(Vmax)を選択するのに適合されている。 (57) ABSTRACT Refrigerator or refrigeration system, preferably of the domestic type, has at least a brushless electric drive motor and an electric frequency control adapted to the motor at a number of different preselectable RPMs. A hermetic reciprocating compressor with a device, the compressor comprising a minimum preselectable RPM (Vmin) in the motor such that the controller stops the operation of the motor. Have. In addition, the controller may set the RPM (Vmax) of the motor different from some pre-selectable RPMs when the controller is supplied with a special combination of external commands or signals that direct the operation of the refrigerator. Adapted to choose.
Description
【発明の詳細な説明】 モータ駆動冷凍圧縮器のための電気制御装置の改良 詳細な説明 本発明は、電気制御回路を備えた改良型のレシプロ密閉型圧縮器、特に家庭型 の冷蔵庫や冷凍庫のための圧縮器に関する。 このような型式の冷蔵圧縮器は、一般に、オンオフ式制御装置を有する電気A C誘導モータを備え、RPMが電気幹線の周波数、すなわち1秒間につき50ま たは60周期と一致する特徴を有する。 冷蔵電気製品の分野における開発動向は、発展するデザイン類型論の普及をも たらし、新鮮な食料保管区画に付言してもまた、すべてのこのような仕切りが単 一の圧縮器によって動作される共通の冷凍回路によって供給された、凍結しおよ び/または凍結された食料の保管区画を備えている。食料の最大許容搭載量が冷 凍区画において冷凍されなければならないときに要求されるエネルギの最高値に 対抗することを可能にするため、これらの装置は必然的に実際の必要以上に高い 容量の圧縮器を備えているが、冷凍目的のためには最大の可能な冷凍能力の要請 の見地からみて十分である。その結果として、冷蔵装置が適当に動作して新鮮食 料保管区画をまさに冷却しているとき、このような圧縮器は過大であることが分 かるし、その頻繁におこる不規則なサイクルのために相当量のエネルギを使用す る。 すべてのひとびとが今までによく気づいているように、エネルギの使用の減少 は、一般に家庭設備の効率の増大に関連され由来するように、さまざまな国にお いてこれらの装置のエネルギ消費記録を制限することを目的として応じることを 期待される厳しい要求を課されてきた製造業者の主要な目標である。 これに関連して、圧縮器の型式もまた例えば同じ出願人によって出願され、ブ ラシなしレシプロ式の圧縮器、およびこれに関連して多数の異なる、予め選択可 能なRPMにて前記圧縮器を動作させるために適合される制御装置の特別な改良 が記載されたイタリア特許出願番号45776/A/90に開示されたように知 られている。前記特許明細書はまた、そこに示された発明の適用の二つの実施例 を記載しており、前記実施例は減少されるエネルギ消費の点でこのような発明の 実施を通じて達成可能な優位性を広く証明している。 このような型式の圧縮器の実用的な使用は、それと関連された電気制御装置と 同様であり、以下に手短かに述べられるいくつかの障害と結局関連される。即ち 、 −潤滑効果の不良または欠落のための摩耗または焼き付きに対して機械的な部 分を保護するため、正確で適正な潤滑オイルの循環が必然である。これは、循環 ポンプの最小の揚程が、潤滑オイルが以下に述べる冷凍積載量、外気温および供 給電圧におけるいくつかの変更の可能な圧縮器の作動状況下におけるすべての摩 耗に曝された部分および点に十分に到達することを可能にすることがとにかく保 証されることを再び要求する。 しかしながら、たとえ動作状況が好適であっても、ポンプによって設定された 揚程はその動作するRPMに依存する。このようなRPMが予め設定された値、 すなわちモータ周波数の設定値に一致する値より減少するとき、圧縮器の正しい 動作が実行されるまでは、危険な状況を構成する動作範囲に入る。仮に、このよ うな危険な現象が避けられなければならないとしても、潤滑オイルの循環に影響 するすべてのさまざまな変更を相当の評価とする間、安全のしきい値として設定 されるRPMよりいくらか低いRPMでの動作を防止されるべき圧縮器のために 適当であろう。 他方、圧縮器の動作が完全に広い安全差内に通常維持され、増加される冷凍性 能が一面で要求され、他面で、このような冷凍性能の付加を供給することが適合 される圧縮器がより高いRPM状況での動作を可能とするように、その特別な環 境がもたらされると同時に、手頃な安全制限内にとどまることを十分に考慮すべ きである。 例えば、このような環境は、相当量の新鮮な食料が速やかに冷凍されなければ ならないとき、または外気温が急上昇するとき、または相対的に暖かい温度であ る相当量の周辺空気が冷凍区画内に入り込むように冷凍区画のドアが頻繁に開放 されるときにも生じるであろう。 このように冷凍性能を増加する要請は、通常、既に知られているように、圧縮 器の連続的な動作段階の拡張を通じて適応され、安定状況または通常の状況下で の作業時に不規則に繰り返されて動作される。しかしながら、このような解決は 、単に本当の問題の部分的な解決であり、その意味で、実際の冷凍の要請に直面 すると、利用できる冷凍性能が連続モードで供給される時間を延長することによ って冷凍する性能の不測を埋め合わせる傾向がある。 実際、伝統的な冷凍装置の冷凍容量の選択は、エネルギの使用をできるだけ多 く減少させるための要請と、十分に許容される冷凍性能特性を保証するための必 要との妥協の結果である。 したがって、その必要は、いくつかの主な構成または設計を変えるための要請 なしですべての上述した障害を排除することを可能にする変動周波数圧縮器を備 えた冷凍装置を提供するために生じる。 本発明の主な目的は、特に添付された請求の範囲および添付の図面を参照した 非限定の実施例の方法によって以下に実質的に述べられる特徴を通じて前記冷凍 装置の構成を改良することであり、図1aおよび1bは本発明の第一の特徴によ る圧縮器の動作を比較して示している。 本発明の前記第一の特徴は、最低の許容可能なモータのRPM Vmin を規定 して成る。RPM Vmin は、もっとも重要な荷の状況、粘度指標または潤滑オ イルの曲線、およびモータRPMが影響する他のすべての要素のようなさまざま な要素を評価するためのものであるが、安全なモータ動作を保証するようなもの 、および特に、潤滑オイルが圧縮器を潤滑およびその関連するすべての摩耗しが ちな部分を十分な許容される範囲まで潤滑することを可能にする。前記最低許容 モータRPMレベルが、モータが故障するのを許容しないしきい値になる。これ は、変動可能な周波数のモータ駆動圧縮と関連する制御装置の一部として、特別 な保護回路装置の提供によって達成される。 モータが故障しないように、このような最低許容RPMしきい値より低い状況 が引き起こされても、前記制御装置はモータをその電源から分離するよう適合さ れており、したがって、電圧が印加されず、直ちにそれが停止する。 これは、図において描かれたグラフで示されよう。図1aは変動可能な周波数 圧縮器であってこのような保護装置を具備しないRPMの変動範囲を示す。最低 許容RPM A、すなわち操作上の最低RPM Bより完全にはっきりと明確に 低い安全RPMしきい値を示すそれが明らかに分かる。前記RPM状況を分離す る安全差はそれを可能にし、実際には、圧縮器モータRPMは、前記操作上の最 低RPM Bが同時にまたRPM変動範囲の最低制限を構成する前記最低許容R PM制限に到達するこのような範囲まで故障しない。 ここで、図1bを参照すると、いかに上述した保護装置の付加が操作上の最低 RPM Aが安全制限、すなわちそれか最低RPM Bと一致するまで低下され ることを許容するかが分かるであろう。このような効果から導かれる利点は、二 つの図に示されたグラフを比較するとき容易に推測されるように、RPM変動範 囲が相応して広がる事実から見出される。 このような最低周波数における保護は、前記制御装置が既にモータの動作周波 数を検出することに適合されることから容易に達成される。そのため、このよう な保護回路が完全に実際に実施されうる方法は、当該技術分野の当業者に到達さ れる。 本発明の有利な改良は、前記最低許容RPMより低いRPMがある予め規定さ れたサイクル数、またはある最小時間が検出された後にのみ、モータを指導させ 、および停止させる保護回路を規定し、明示して成る。このような予防措置は、 急な電圧の一時的な非固有信号またはパルス等の影響によりモータが一時的に遅 速して安定しない最低許容RPM Vmin より低くなる事実に鑑みて取り入れら れるべきである。これらは、適正な潤滑のために臨界であることが証明される時 間の長期のためにそれを遅速することを可能にすることを引き起こす。 さらに、有利な改良は、適当な手段を有する前記保護回路を備えて成る。保護 回路は、リセットまたはこのような立上りが実行された後に再びそれを可能にす るため、始動の立上り時に自動的にそれを遮断しまたは不可能にすることが可能 な適当な手段を有する。 このような保護装置の非許容またはリセットは、モータおよびその荷の特徴を 基礎として、このような最低の許容されるRPMまたは予め設定された他のしき い値RPM Vs に基づいて実行することが許容され、再び超えられよう。 第二の前述した要求、すなわち工場で設定されるレイトより高い能力で制限さ れた時間で圧縮器を動作させる可能性が関係する限りでは、本発明の第二の特徴 により、時間を規定し、かつ制限するため、圧縮器の動作と一致すべく最高の許 容されるRPM Vmax が規定される。前記最高の許容されるRPMは、前記制 御装置により、外部から送られる適当な命令に基づいて制御される。 安定状況のそれより高い冷凍性能を設定することによって、冷凍されるべき同 じ量の新鮮な食料のために要求された冷凍時間を短くし、または要求される同じ 冷凍時間で冷凍されるべき新鮮な食料の量を増加するため、付加された冷凍性能 を使用するこのような方法が可能である。 このような動作方法の有利な改良は、前記制御装置に、例えば外気温、内部保 管温度、潤滑オイルの温度、使用者によって設定可能となっている温度のような 冷凍装置の異なる動作状況の指示である信号の組合せを送ることで成り、そのた め、特に好ましい状況およびその組合せのもとで、前記制御装置が予め設定され た時間間隔またはこのようなRPMがまさる動作が命令される状況まで典型的な 安定状況のRPMより高いRPM Vmax’にてモータを動作することを引き起 こすように作動するようになることを可能にする。 このような第二のRPM Vmax’は、人が欲する機能の型式によって要求に 応じまたはこれらの二つの異なる場合を達成するため、前記RPM Vmax と一 致するかも知れないし、しないかも知れないことがもちろん認識されよう。 前記RPMの二つのVmax およびVmax’は、適当なリセットコマンドが外部 から送られるや否や、または冷凍装置の前述した動作状況が終了して現存するや 否や制御装置によって切り換えられることはもちろんである。 本発明は、いくつかの好適なその実施形態によって代表される実施例に基づき 一般に知られた用語を用いて述べられたが、これらによって制限されるものでは なく、当該技術分野の当業者が認識するであろう構成および電気回路構成の双方 によってもたらされる他の多数の変更や修正が可能である。Description: IMPROVEMENT OF ELECTRICAL CONTROL DEVICE FOR MOTOR-DRIVEN REFRIGERATION COMPRESSOR Detailed description of the invention The present invention relates to an improved reciprocating hermetic compressor with an electric control circuit, especially for household refrigerators and freezers. For compressors for. Refrigerating compressors of this type generally comprise an electric AC induction motor with an on-off control device and are characterized in that the RPM corresponds to the frequency of the electric mains, ie 50 or 60 cycles per second. Development trends in the field of refrigerated appliances have led to the prevalence of evolving design typologies, and even with the addition of fresh food storage compartments, all such partitions are commonly operated by a single compressor. It comprises a storage compartment for frozen and / or frozen food supplied by a refrigeration circuit. To allow the maximum allowable load of food to counter the highest values of energy required when it must be frozen in the refrigeration compartment, these devices necessarily have a higher compression capacity than is actually necessary. Although equipped with a vessel, it is sufficient for refrigeration purposes in terms of the demand for the maximum possible refrigeration capacity. As a result, such compressors are found to be oversized when the refrigeration equipment is operating properly and is just cooling the fresh food storage compartment, and due to its frequent and irregular cycles. Uses a certain amount of energy. As all have been well aware so far, the reduced use of energy limits the energy consumption record of these devices in various countries, as is commonly associated with increased efficiency of household equipment. It is a major goal of manufacturers who have been subject to the strict requirements that are expected to be met for the purpose. In this connection, a compressor type is also filed, for example by the same applicant, operating the compressor at a brushless reciprocating compressor and in this connection a number of different, preselectable RPMs. It is known as disclosed in Italian Patent Application No. 45776 / A / 90, which describes a special modification of the control device adapted to allow it. The patent specification also describes two embodiments of the application of the invention presented therein, said embodiments having the advantage achievable through the practice of such an invention in terms of reduced energy consumption. Is widely proven. The practical use of such a type of compressor is similar to the electrical controls associated with it, and is ultimately associated with some of the obstacles briefly described below. An accurate and proper circulation of the lubricating oil is necessary in order to protect the mechanical parts against wear or seizure due to poor or missing lubrication effect. This is because the minimum head of the circulation pump is the part where the lubricating oil is exposed to all wear under the operating conditions of the compressor, with several possible variations in refrigerating load capacity, ambient temperature and supply voltage as described below. It again demands that it is guaranteed anyway to be able to reach the point fully. However, even if the operating conditions are favorable, the head set by the pump depends on its operating RPM. When such RPM decreases below a preset value, that is, a value corresponding to the set value of the motor frequency, it enters an operating range that constitutes a dangerous situation until the correct operation of the compressor is performed. Even if such a dangerous phenomenon should be avoided, it is somewhat lower than the RPM set as a safety threshold during the appreciable evaluation of all the various changes affecting the circulation of the lubricating oil. Appropriate for compressors to be prevented from operating in RPM. On the other hand, the operation of the compressor is usually maintained within a completely wide safety margin, an increased refrigeration performance is required on the one hand, and on the other hand a compressor adapted to supply such an addition of refrigeration performance. In order to allow its operation in higher RPM situations, its special environment should be provided while at the same time remaining within affordable safety limits. For example, such an environment may be one where a significant amount of fresh food must be quickly frozen, or when the ambient temperature spikes, or a significant amount of ambient air, which is a relatively warm temperature, enters the refrigeration compartment. It may also occur when the door of the refrigeration compartment is frequently opened to enter. The demands for increasing the refrigeration performance in this way are usually adapted through the expansion of the continuous working stages of the compressor, as is already known, and are irregularly repeated when working under stable or normal conditions. Be operated. However, such a solution is only a partial solution to the real problem, and in that sense, in the face of actual refrigeration demands, by extending the time during which the available refrigeration performance is delivered in continuous mode. There is a tendency to make up for the unforeseen performance of freezing. In fact, the choice of refrigeration capacity for traditional refrigeration systems is a result of the tradeoff between the desire to reduce energy use as much as possible and the need to ensure well-accepted refrigeration performance characteristics. Therefore, the need arises to provide a refrigeration system with a variable frequency compressor that makes it possible to eliminate all the above-mentioned obstacles without the need to change some main configurations or designs. The main object of the present invention is to improve the construction of the refrigeration system through the features substantially described below by the method of non-limiting examples, with particular reference to the appended claims and the accompanying drawings. , 1a and 1b show in comparison the operation of a compressor according to the first aspect of the invention. The first aspect of the invention comprises defining a minimum acceptable motor RPM Vmin. RPM Vmin is for evaluating various factors such as the most important load situation, viscosity index or lubricating oil curve, and all other factors that motor RPM affects, but safe motor operation. And, in particular, the lubricating oil makes it possible to lubricate the compressor and to lubricate all of its associated wear-prone parts to a sufficiently acceptable extent. The minimum acceptable motor RPM level is a threshold that does not allow the motor to fail. This is accomplished by the provision of special protection circuitry as part of the controller associated with variable frequency motor driven compression. The controller is adapted to isolate the motor from its power supply even when such a situation occurs below the minimum permissible RPM threshold so that the motor does not fail, and thus no voltage is applied, Immediately it stops. This would be illustrated by the graph drawn in the figure. FIG. 1a shows the variable range of the RPM, which is a variable frequency compressor, without such a protection device. It can be clearly seen that the lowest acceptable RPM A, ie a completely clear and clearly lower safe RPM threshold than the lowest operational RPM B. The safety difference separating the RPM situations makes it possible, in fact, the compressor motor RPM is at the minimum allowable RPM limit at which the operational minimum RPM B simultaneously and also constitutes the minimum limit of the RPM fluctuation range. It does not fail to reach such a range. Referring now to FIG. 1b, it will be seen how the addition of the protective device described above allows the operational minimum RPM A to be lowered until it is consistent with the safety limit, ie, the minimum RPM B. . The advantage derived from such an effect is found in the fact that the RPM variation range is correspondingly widened, as is easily inferred when comparing the graphs shown in the two figures. Such protection at the lowest frequency is easily achieved because the controller is already adapted to detect the operating frequency of the motor. Therefore, the person skilled in the art will know how such a protection circuit may be implemented in full. An advantageous refinement of the invention is to define a protection circuit which causes and stops the motor only after a pre-defined number of cycles with a RPM lower than said minimum permissible RPM or a certain minimum time has been detected, It will be done. Such precautionary measures should be taken in view of the fact that the motor is temporarily slowed down by the effects of transient non-specific signals or pulses of abrupt voltage to lower than the minimum allowable RPM Vmin. These cause it to be possible to slow it down for a long period of time which proves to be critical for proper lubrication. Furthermore, an advantageous refinement comprises said protection circuit with suitable means. The protection circuit has suitable means for enabling it again after a reset or such a rise has been carried out, so that it can be automatically interrupted or disabled at the rise of the start. Non-permissive or resetting of such protective devices may be carried out on the basis of the characteristics of the motor and its load based on such a minimum permissible RPM or other preset threshold value RPM Vs. Acceptable and will be exceeded again. As far as the second previously mentioned requirement, namely the possibility of operating the compressor for a limited time with a capacity higher than the factory set rate, is concerned, the second aspect of the invention defines the time, And for the sake of limitation, the maximum allowed RPM Vmax is specified to match the compressor operation. The maximum allowed RPM is controlled by the controller based on the appropriate command sent externally. Shorten the freezing time required for the same amount of fresh food to be frozen by setting a higher freezing performance than that in a stable situation, or fresh to be frozen at the same freezing time required. Such a method, with the added refrigeration capacity, is possible to increase the amount of food. An advantageous refinement of such a method of operation is that the control device is instructed of different operating conditions of the refrigeration system, for example ambient temperature, internal storage temperature, lubricating oil temperature, user-settable temperature. , Which is typical for situations in which the controller is commanded under a preset time interval or such RPM operation under particularly favorable circumstances and combinations thereof. Allows the motor to come into operation causing the motor to operate at a higher RPM Vmax 'than a stable steady state RPM. Such a second RPM Vmax 'may or may not be consistent with said RPM Vmax, depending on the type of function one desires to achieve or to achieve these two different cases. Will be recognized. Of course, the two Vmax and Vmax 'of the RPM are switched by the controller as soon as an appropriate reset command is sent from the outside or as soon as the above-mentioned operating conditions of the refrigeration system have ended. Although the present invention has been described using commonly known terms based on the examples represented by some preferred embodiments thereof, the present invention is not limited thereto and will be recognized by those skilled in the art. Numerous other changes and modifications are possible, both due to the structure and electrical circuitry that would
【手続補正書】特許法第184条の7第1項 【提出日】1995年3月15日 【補正内容】 請求の範囲 1. 少なくともブラシなし式の電気駆動モータ、および多数の異なる予め選択 可能なRPMのときに該モータに適合される電気周波数制御装置を備えた密閉型 レシプロ圧縮器を具備し、前記モータにおいて最低の許容される予め選択可能な RPM(Vmin)によって構成され、前記制御装置が前記モータの動作を停止す るのに適合された保護装置を有する冷蔵庫または冷凍装置、好ましくは家庭型の ものであって、 前記制御装置は、前記最低の許容されるRPM(Vmin)より低いRPMにて 、動作される予め規定された回転数または動作する予め規定されたモータの時間 間隔が検出された後にのみ、前記モータの前記保護装置を作動させるのに適合さ れていることを特徴とする装置。 2. 前記制御装置は、前記制御装置が第一の外部コマンドを供給されるとき、 いくつかの予め選択可能なRPMと異なるモータRPM(Vmax)を選択するの に適合されていることを特徴とする請求項1による装置。 3. 前記制御装置は、前記制御装置が前記装置が動作される方法およびその状 況を指示する第一の信号の組合せを供給されるとき、いくつかの予め選択可能な RPMと異なるモータのRPM(Vmax’)を選択するのに適合されていること を特徴とする前記請求項のいずれかに記載の装置。 4. 前記異なるRPM(Vmax,Vmax’)がいくつかの予め選択可能なRPM より高いことを特徴とする請求項2または3による装置。 5. 前記制御装置は、前記制御装置が前記装置の作動状況が指示される第二の 信号の組合せを供給されるとき、または前記RPM時においてモータの動作の開 始から経過される予め設定された時間間隔後のいずれかに前記異なるRPM(V max,Vmax’)を除外するのに適合されていることを特徴とする請求項4による 装置。 6. 前記制御装置が、前記制御装置が第二の外部コマンドを供給されるとき前 記異なるRPM(Vmax,Vmax’)を除外するのに適合されていることを特徴と する請求項2または4による装置。[Procedure of Amendment] Article 184-7, Paragraph 1 of the Patent Act [Submission date] March 15, 1995 [Correction contents] The scope of the claims 1. At least a brushless electric drive motor, and a number of different preselections Closed type with electrical frequency controller adapted to the motor at possible RPM Equipped with reciprocating compressor, the lowest acceptable preselectable in said motor It is constituted by RPM (Vmin), and the control device stops the operation of the motor. Refrigerator or freezer with protective device adapted to store, preferably home-use The thing At the RPM lower than the minimum allowable RPM (Vmin), the controller is , Pre-defined speed to be operated or pre-defined motor time to operate Only suitable for actuating the protective device of the motor after a distance has been detected. A device characterized by being installed. 2. The control device, when the control device is supplied with a first external command, Choose a different motor RPM (Vmax) than some pre-selectable RPMs The device according to claim 1, characterized in that 3. The control device comprises a method by which the control device is operated and its state. Some preselectable when supplied with a first signal combination indicating the status Must be adapted to select the RPM (Vmax ') of the motor different from the RPM Device according to any of the preceding claims, characterized in that 4. The different RPMs (Vmax, Vmax ') are several preselectable RPMs Device according to claim 2 or 3, characterized in that it is higher. 5. The control device is a second control device in which the operating condition of the device is instructed. When the combination of signals is supplied or during the RPM, the operation of the motor is opened. Any of the different RPM (V max, Vmax ') is adapted to exclude. apparatus. 6. Before the control device is supplied with a second external command Note that it is adapted to exclude different RPMs (Vmax, Vmax '). Apparatus according to claim 2 or 4.
Claims (1)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT93A000073 | 1993-12-01 | ||
IT93PN000073A IT1268534B1 (en) | 1993-12-01 | 1993-12-01 | REFRIGERATED MOTORCOMPRESSORS WITH PERFECTED ELECTRONIC CONTROL |
PCT/EP1994/003810 WO1995015468A1 (en) | 1993-12-01 | 1994-11-17 | Improvement in the electronic control arrangement for motor-driven refrigeration compressors |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH09505978A true JPH09505978A (en) | 1997-06-10 |
JP3573750B2 JP3573750B2 (en) | 2004-10-06 |
Family
ID=11394843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51535895A Expired - Fee Related JP3573750B2 (en) | 1993-12-01 | 1994-11-17 | Compressor for refrigerator with protection device |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0730721B1 (en) |
JP (1) | JP3573750B2 (en) |
AT (1) | ATE162612T1 (en) |
BR (1) | BR9408177A (en) |
CA (1) | CA2172712C (en) |
DE (1) | DE69408162T2 (en) |
DK (1) | DK0730721T3 (en) |
ES (1) | ES2114296T3 (en) |
IT (1) | IT1268534B1 (en) |
WO (1) | WO1995015468A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITPN20000074A1 (en) * | 2000-12-04 | 2002-06-04 | Zanussi Elettromecc | REFRIGERATOR APPLIANCE WITH A MULTIPLE OF COMPARTMENTS |
BRPI0501446A (en) | 2005-04-29 | 2006-12-12 | Brasil Compressores Sa | method of protection against breakage of lubricating oil film in hermetic compressor bearings |
US10767881B2 (en) | 2017-03-30 | 2020-09-08 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Method and device for controlling a compressor |
CA3021241C (en) * | 2017-03-30 | 2020-07-14 | Gd Midea Air-Conditioning Equipment Co., Ltd. | Method and device for controlling a compressor |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62108947A (en) * | 1985-11-07 | 1987-05-20 | Matsushita Electric Ind Co Ltd | Compressor control device of heat-pump type air conditioner |
US5023531A (en) * | 1988-05-19 | 1991-06-11 | Arx, Inc. | Dual hybrid demand refrigeration control apparatus |
IT1247635B (en) * | 1990-12-11 | 1994-12-28 | Zanussi Elettromecc | IMPROVEMENT IN REFRIGERATING MOTOR-COMPRESSORS WITH ELECTRONIC CONTROL |
DE69205918T2 (en) * | 1991-08-20 | 1996-04-04 | Tecumseh Products Co | Protective circuit in an inverter for refrigerators. |
-
1993
- 1993-12-01 IT IT93PN000073A patent/IT1268534B1/en active IP Right Grant
-
1994
- 1994-11-17 CA CA002172712A patent/CA2172712C/en not_active Expired - Fee Related
- 1994-11-17 EP EP95900756A patent/EP0730721B1/en not_active Expired - Lifetime
- 1994-11-17 BR BR9408177A patent/BR9408177A/en not_active IP Right Cessation
- 1994-11-17 AT AT95900756T patent/ATE162612T1/en not_active IP Right Cessation
- 1994-11-17 JP JP51535895A patent/JP3573750B2/en not_active Expired - Fee Related
- 1994-11-17 DE DE69408162T patent/DE69408162T2/en not_active Expired - Lifetime
- 1994-11-17 ES ES95900756T patent/ES2114296T3/en not_active Expired - Lifetime
- 1994-11-17 DK DK95900756T patent/DK0730721T3/en active
- 1994-11-17 WO PCT/EP1994/003810 patent/WO1995015468A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
IT1268534B1 (en) | 1997-03-04 |
DE69408162T2 (en) | 1998-05-07 |
EP0730721B1 (en) | 1998-01-21 |
CA2172712C (en) | 2001-06-05 |
ITPN930073A0 (en) | 1993-12-01 |
WO1995015468A1 (en) | 1995-06-08 |
EP0730721A1 (en) | 1996-09-11 |
ITPN930073A1 (en) | 1995-06-01 |
JP3573750B2 (en) | 2004-10-06 |
BR9408177A (en) | 1997-05-27 |
DE69408162D1 (en) | 1998-02-26 |
CA2172712A1 (en) | 1995-06-08 |
ATE162612T1 (en) | 1998-02-15 |
DK0730721T3 (en) | 1998-09-21 |
ES2114296T3 (en) | 1998-05-16 |
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